Bovine Intervention

You unlock Basic Milk at 3

This character can make one per long rest

This item heals 2d4 + 2 

Level 12, you unlock Greater Milk

This character can then make either 2 normal or one greater milk

The Greater Milk heals 4d4 + 4 

Level 18 this character unlocks Superior Milk

Then the player can choose 2 greater milk or 1 superior milk of 8d4 +8 per long rest

At level 20 you unlock Bovine Intervention, and you can revive a friendly player for all of your hp except for 1 (one). This hp can only be healed by other means than the characters own milk. This player can be revived normally for 3 days, after that point, they turn into a dhampir if revived. This action can only happen after 2 long rest.